Configuring A Server Behind Nat - ZyXEL Communications ZyXEL ZyWALL 50 User Manual

ZyWALL 50 Internet Security Gateway
Finger
HTTP (Hyper Text Transfer protocol or WWW, Web)
POP3 (Post Office Protocol)
NNTP (Network News Transport Protocol)
SNMP (Simple Network Management Protocol)
SNMP trap
PPTP (Point-to-Point Tunneling Protocol)

6.4.1 Configuring a Server behind NAT

Follow these steps to configure a server behind NAT:
Step 1. Enter 15 in the main menu to go to Menu 15 - NAT Setup.
Step 2.
Enter 2 to go to Menu 15.2 - NAT Server Setup.
Step 3. Enter a port number in an unused Start Port No field. To forward only one port, enter it again
in the End Port No field. To specify a range of ports, enter the last port to be forwarded in the
End Port No field.
Step 4.
Enter the inside IP address of the server in the IP Address field. In the following figure, you
have a computer acting as an FTP, Telnet and SMTP server (ports 21, 23 and 25) at
192.168.1.33.
Step 5. Press [ENTER] at the "Press ENTER to confirm ..." prompt to save your configuration after
you define all the servers or press [ESC] at any time to cancel.
6-14
Table 6-7 Services & Port Numbers
SERVICES PORT NUMBER
79
80
110
119
161
162
1723
NAT